Douglas Sakamoto, M.D.
Ophthalmology Physician · Torrance, CA
Douglas Sakamoto, M.D. is an ophthalmology physician with a practice address in Torrance, California, and NPI 1871566554, issued on Feb 10, 2006. Check the license (California A87145, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Douglas Sakamoto
- Credential
- M.D.
- Primary taxonomy
- Ophthalmology Physician 207W00000X
- License number
- A87145 CA
Self-reported in NPPES; status is on the state search - Practice location
- 23609 Hawthorne Blvd Ste A, Torrance, CA 90505
- Phone
- (310) 378-7474
- Enumerated
- Feb 10, 2006
- Record last updated
- Aug 5, 2022
- Fax
- (310) 378-5454
- Medicare enrollment
- Enrolled (PECOS I20040924000997); accepts Medicare assignment
- Medical or professional school
- University Of Southern California Keck School Of Medicine, 2000
- Entity
- Type 1 · individual
8 nearest ophthalmology physician records → All 2,899 in California → Look up another NPI →
Verify Douglas Sakamoto in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A87145Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
2.5 times the Medicare Part D claims of the average ophthalmology physician in 2024
3,836 Medicare Part D claims for 769 beneficiaries, against an average of 1,518 among the 16,459 providers of this specialty who prescribed in Part D. Brand-name drugs were 40% of claims.
Most prescribed
- Latanoprost755 claims
- Timolol Maleate417 claims
- Dorzolamide-Timolol382 claims
- Brimonidine Tartrate333 claims
- Prednisolone Acetate273 claims
- Lumigan223 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Industry payments in 2024: $105.28
6 payments; by number, the most common kind was food and beverage; the largest payer was Alcon Vision LLC. The 13,221 providers of this specialty with any payment received $4,535.02 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Douglas Sakamoto among 2,899 ophthalmology physician records in California
Douglas Sakamoto, M.D. is one of 2,899 ophthalmology physician records with a practice address in California. 79% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 9% of them.
- NPI issued2006 · 9% of these records are older, 45% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 66% of these records are
- Graduated2000 · median 2001 among the 1,907 with a school on file
- Record last updated2022 · 67% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207W00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Ophthalmology Physician providers in California
There are 2,899 ophthalmology physician records in California.
All 2,899 in California → Every provider in Torrance → Ophthalmology Physician nationwide →
The 8 ophthalmology physician records with the nearest ZIP codes
- Damien Goldberg, M.D.Torrance, CA 905051891833695
- Steven Khwarg, MDTorrance, CA 905051316007230
- Amr KouchoukTorrance, CA 905051639499718
- Alex Liu, M.D.Torrance, CA 905051275553158
- Angus Macdonald, MDTorrance, CA 905051023164415
- John Maher, M.D.Torrance, CA 905051265561211
- Alfred Marrone, M.D.Torrance, CA 905051841388907
- Lydia Matkovich, M.D.Torrance, CA 905051508801028
Common questions
What is Douglas Sakamoto, M.D.'s NPI number?
Douglas Sakamoto, M.D.'s National Provider Identifier (NPI) is 1871566554, issued on Feb 10, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Douglas Sakamoto, M.D. located?
The NPPES record lists a practice address at 23609 Hawthorne Blvd Ste A, Torrance, CA, 90505. Phone: (310) 378-7474. Providers update this record themselves, so call before visiting.
How can I verify Douglas Sakamoto, M.D.'s license?
NPPES lists California license number A87145, as entered by the provider. Search the Medical Board of California at https://www.mbc.ca.gov/License-Verification/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Douglas Sakamoto, M.D. prescribe under Medicare Part D?
In 2024, Douglas Sakamoto, M.D. had 3,836 Medicare Part D claims for 769 beneficiaries; the average among ophthalmology physician prescribers was 1,518. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.